package com.kaifamiao.www.demo.do0807;

public class Demo {
    public static void main(String[] args) {

    }
    public static int maxSubString(String str){
        if(str == null && str.isEmpty()){
            return -1;
        }
        if (str.length() == 1){
            return 1;
        }

        return 0;
    }
}
